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Is your Grado corroded? - Page 2

post #16 of 22
1/10/10 at 5:43am
Quote:
Originally Posted by iponderous View Post
It's the mods...
Wow. I didn't even say something remotely incite-ful.
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post #17 of 22
1/11/10 at 3:40am
Thread Starter 

pictures of corroded Grado 225i

Here are some pictures of the corroded metal shield in front of the Left speaker.

To take pictures of these corrosion, I need to put the Left speaker about 45 degrees under direct sunlight, so the bright reflection will make the traces stand out.

I don't attach the picture of the Right speaker because the corrosion are more homogeneous and will not be seen as clearly on the pictures as the Left speaker.

Note:
1/ The dark spot in the upper part made me think that it was a dead cockroach, but it was not.
2/ The corrorion spread out very quick (from 40% of surface to what you see now), just in a few days.
LL
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LL
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post #18 of 22
1/11/10 at 3:49am
You do realize that the grill we're looking at in your pics is plastic with a fibrous screen over it, right...
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post #19 of 22
1/11/10 at 4:23am
I'm with Joelby. The fibrous cloth is affixed to a plastic screen using some sort of fixative. Grados often have this fixative applied inconsistently, and therefore you get the heterogeniety/uneven "shading" seen above. (Check out the Symphones Magnum mod' site where you will see the screen with the cloth removed. It is definitely plastic, the material of choice for all lower end Grados: http://www.symphones.ca/ Pretty sure that that part of the can {driver cover} is always plastic, actually.) Again, it's plastic and not metal and there is nothing to worry about, sir. Pretty funny that a fuss was made over this, in the first place. You weren't having us on, I hope? I'm pretty fussy about aesthetics, but you gotta draw the line somewhere. Happy listening.
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post #20 of 22
1/11/10 at 6:31am
Thread Starter 
Thanks,

I don't want to make a big noise on small thing, but this is my 1st experience on a Grado, I'm used to the perfect outfit, look of a mass-production headphone such as Sony, and did not expect that a 3 times more expensive than my Sony MDR-V6 can has a such corrosion look-like screen, especially the traces spread out day by day (this Grado is my 1st high-end can so I watch at it every day like a jewel, especially at the "cockroach-like" spot, and I really see them spread out like corrosion day after day).

I was a mechanical engineer and used to production problem, I don't see relation between the inconsistently applied fixative and the spread out traces, because the fixative could be applied inconsistently but the "shade" can not spread out as what I see. I also imagined that the fixative was applied only on the rim of the fibrous cloth.

I agree that this "shade" issue does not affect sound quality, but I still wonder how it really happens; if other Grado's owners have similar "issue" or not, if they don't have, it means that the manufacturing process is not stable, and it would imply other things (this thought is my professional reflex).

Thank you very much for your kind feed-backs.
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post #21 of 22
1/11/10 at 5:15pm
Yeah... come to think of it, some of the screens I've seen on my Grados in the past have had the same "problem", but because it has no impact on the sound or even the aesthetics when wearing them or laying them flat in storage, I have paid no mind.
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post #22 of 22
1/11/10 at 6:46pm
I have never seen this with either of my Grado's. I can deal with the corroded look being normal, but an appearance that's changing with time, i.e., a corroded look that's changing and evolving with use? That's a different matter.

The pics you posted are not showing things clearly, but it's a tad concerning I have to admit. What's the warranty you have on them?
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